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\ 2 Sheets-Sheet 1. G. C. ILG.

f SAFETY'APPARATUS FOR ELEVATORS.

Patented Feb. 1, 1898.

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2 sheets sheet 2.

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.0. 0. ILG. I SAFETY APPARATUS FOR ELEVATOM No. 598,151. A Patented Feb.1,1898.

UNITED ST TES PATENT tries.

SAFETY APPARATUS FOR ELEVATORS.

.SIEEGIFIGATION forming part of Letters IPatent No. 598,151, datedFebruary 1, 1898. Application as July 11, 1896. Serial No. 598,840. onmodel.)

To aZZ whom it may concern.-

Be it known that I, CARL CHRISTIAN ILG, a citizen of the Empire ofAustria-Hungary, residing at New York, county and State of New York,have invented a new and useful I111:

' vator-car is driven by a stationary rope extending upward through theelevator-shaft, the wheel being in frictional engagement with the rope.From the friction-wheel a regulator provided with a clutch device isdriven, which device serves to effect the operation of a series ofbrake-blocks adapted to cooperate with a rope, cable, or otherstationary appliance extending from top to bottom of the elevator-shaft.

The objects sought to be attained by my invention may be briefly statedas follows: first, the stopping of the elevator-car in the event of itsspeed becoming unduly great; second, the bringing of the car to animmediate stop in case the driving-cable should break; third, theproviding of suitable means for moving the car to a safe position shouldit stop as aforesaid.

I will now describe an apparatus embracing the features of my invention,subsequently defining the novelty of the same in claims.

In the accompanying drawings, Figure 1 is a front view of an apparatusembodying my invention. Fig. 2 is a top view of the same. Fig. 3 is across-section, enlarged, of the regulator shown in 1, illustrating theclutch device. Certain portions are, however, omitted in this figure.Figs. 4:, i, and 4: are side views of certain brake-blocks comprised inthe apparatus and which are shown in different positions. Fig. 5 is aperspective view of an apparatus embodying the improvement mounted uponthe top of an elevator-car.

Similar letters of reference designate corresponding parts in allfigures.

The upright X, erected upon the top of the elevator-car Z, carries therotary shaft m, to one extremity of which there is secured thefriction-wheel S. For the purpose of greater lateral rigidity this shaftmay turn in bear ings in a bracket E extending from the upright Thewheel s is in frictional engage ment witha rope P, of suitable material,connected at its ends to the bottom and top of the elevator-shaft. Theother end of the shaft m is provided with one of a pair of bevelwheelsat n, the other one of the pair being fixedlyattached to a shaft e,whichis rotated in bearings located at the extremity of a bracket E,extending from the upright X, by the engaging bevel-wheels.

Directly below and in line with the shaft e there is mounted a shortshaft gin bearings in the bracketE. This latter shaft is adapted to movenot only rotarily, but also lengthwise. The adjacent ends of the shaftse and q are provided with clutch members M and M, by means of which thetwo shafts may be connected and driven as one. The engagement anddisengagement of this clutch is effected by a regulator 0, consisting ofarms U u, pivoted to a collar on the shaft 6, and centrifugal balls 1013, secured to the free ends of the arms. A Vertically-movable sleeve Qis connected by links with the arms it a. This sleeve eX tendsdownwardly below the clutch member M, under the bottom surface of whicha shoulder on the sleeve projects. Evidently from this construction whenthe balls rise the sleeve .Q ascends and the members of the clutch arebrought into engagement. A contrary movement of the balls will serve todisengage the clutch, the shaft q dropping down under its own weight.

W is a shaft journaled in hearings in the upright X and the upright X.This shaft carries at each extremity a brake-block B, while intermediateof its ends there is affixed to it a bevel gear-wheel 0, which coactswith a second bevel-wheel 0 at the lower extremity of the shaft g. Thisshaft q is provided with an enlargement G at its lower extremity,whichplays in a recess 3 in the geanwheel 0 at the extremity of the shaft.This will permit the longitudinal movement of the shaft q Withoutcausing the disengagement of the pair of gears 0 0.

- A second horizontal shaft W, substantially parallel to the shaft W, isjournaled in bearings in the uprights X and X, the two shafts beingcompelled to move in unison by engaging gear-segments Y and Y". Theshaft W carries also at its extremities the brake-blocks B B, which,with the brake-blocks at the ends of the shaft W, constitute two pairsof the same, one at each side of the elevator-car. Each pair ofbrake-blocks coacts with a stationary rope,'cable, or the like R,extending from top to bottom of the elevator-shaft, and the extremitiesof. the two shafts at each side of the elevator-car are connected by aplate T, the better to keep the rope, &c., R from sliding out of place.c

s is a hand operating-shaft supported in the upright X and thepillow-block X dis a collar for preventing lengthwise movement of thisshaft, which latter has a gear-segment F meshing with the gear-wheel D,affixed to the shaft W. From the shaft sthere extends a lever H, havinga handle h within reach of the elevator-man in the elevator-car.

The upper and lower parts of the segment Y are connected to a rope V,which passes through the elevator-car, as shown in Fig. 5, moving up anddown with the same. Should the lifting-cable of the car break, arelative movement of the car and rope takes place, resulting in theadjustment of the brakeblocks into a braking position, and thusantomatically bringing the car to a stop.

The uprights X and X may be fastened to the top of the car by anysuitable means-4hr instance, bolts U.

The shape of the brake-blocks Bis plainly shown in Figs. 4, 4c, and a aswell as the method in which the same operate, Fig. 4 showing theposition of the blocks when the descent of the elevator-car is brakedand Fig.

4 their position when preventing a too rapid rise of the car.

The operation of the apparatus may be briefly described as follows: Theregulator O is driven through the medium of the rope P andfriction-wheel S, as already described. Should the movement of theelevator-car in either direction become too rapid, the member M of theclutch is raised into engagement,

with the member M and the shaft W is turned in its bearings.Simultaneously with this movement of the shaft W the shaft W is turnedand the pairs of brake-blocks at the ends of the respective shafts arebrought into a braking position. The brake-blocks may be disengaged fromthe ropes R R by means of the lever II and its connections, theoperation of which is plainly evident from the position.

Having described myinvention, what I consider as new, and desire tosecure by Letters Patent, is-

1. In a safety device for elevators, the combination ofv afriction-wheel mounted upon the elevator-car, a rope extending thelength of the elevator-shaft and imparting motion to the friction-wheel,a pair of shafts rotarily mounted on the elevatorcar and gearingconnecting said shafts with each other, brake- .blocks secured to theends of said shafts,

means with which said blocks cooperate, a

regulator driven from said friction-wheel,

and mechanism comprising a clutch, through which said regulator turnsone of said parallel shafts, the regulator serving to engage ordisengage the members of the clutch, substan i of the elevator-shaft andimparting motion to the friction-wheel, a pair of shafts rotarilymounted on the car and gearing connecting said shafts with each other,brake-blocks secured to the ends of said shafts, means with which saidbrake-blocks cooperate, a regulator driven from said friction-wheel,mechanism comprising a clutch, through which said regulator turns one ofsaid parallel shafts, the regulator serving to engage or disengage themembers of the clutch, a rope extending the length of the elevator-shaftand mechanically connected With one of the said shafts for causing theautomatic operation of the brakingblocks, and a hand-lever fordisengaging the blocks, substantially as specified.

CARL CHRISTIAN ILG. \Vitnesses:

CHARLES WILLIAM GEIL, ALFRED TSOHINKEL.

